Vulnerability · Published Nov 4, 2026 · Assigned by twcert
CVE-2026-121818About Time Technologies｜Herowatch Go - Security Misconfiguration
High 7.8
In plain English
A high-severity security flaw in Herowatch Go from About Time Technologies. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Herowatch Mini developed by About Time Technologies has a system signing vulnerability. Authenticated local attackers can exploit a publicly available test key to sign malicious programs, allowing them to elevate privileges and execute arbitrary code.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| About Time Technologies | Herowatch Go | all |
Weakness: CWE-1394 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://www.twcert.org.tw/en/cp-139-11362-1e829-2.html third-party-advisory
- https://www.twcert.org.tw/tw/cp-132-11360-ab123-1.html third-party-advisory